P0736 means Reverse Incorrect Gear Ratio. In reverse, the measured ratio between input and output speeds does not match the expected reverse gear ratio, meaning something is slipping. It is a generic OBD-II code, so the definition is the same on any make, but the most likely cause varies by engine; confirm with a scan tool and the service information for your vehicle before buying parts.
What P0736 means
Electronically controlled automatics are run by a transmission control module (TCM), a separate box or part of the engine computer. It reads speed sensors, the range sensor and fluid temperature to decide when to shift, and drives solenoids that apply clutches and the torque converter clutch. Many basic code readers only show the generic P0700; a scan tool that reads the transmission module shows the specific fault. Check fluid level and condition first, since low or burnt fluid causes many transmission codes.
P0736 symptoms
- Slow or no reverse engagement
- Slipping in reverse
- Check engine light
Common causes of P0736
- Low fluid level
- Worn reverse clutch or band
- Leaking seals in the reverse circuit
- Valve body faults
How to diagnose P0736
- Check transmission fluid level and condition first
- Check reverse engagement time
- Perform a line pressure test in reverse
- Read other ratio codes
Can you drive with P0736?
Forward gears may still work, but have reverse checked before the slip causes more damage.
P0736 tips
Slow reverse that improves when warm points to worn seals; no reverse at any temperature points to the reverse clutch or band.
Will P0736 clear itself?
If the fault stops, the computer turns off the check engine light by itself after several drive cycles without seeing it again, and the code stays in memory as history for a while. Clearing P0736 with a scan tool after a repair is fine, but if the cause is still there the code returns, sometimes within one drive. Disconnecting the battery also clears codes on most vehicles, but it erases learned fuel trims and idle settings as well.
Related codes
| Code | Meaning |
|---|---|
| P0730 | Incorrect Gear Ratio |
| P0700 | Transmission Control System Malfunction |
| P0894 | Transmission Component Slipping |
Guides that help
When it is more than a sensor
If the fault turns out to be internal (worn clutches, a failed converter or a damaged valve body), compare a rebuild with a replacement in transmission rebuild vs replacement and transmission replacement cost, identify your unit with what transmission do I have?, and browse our transmissions.
Shipping is a flat $80.00 per order to US addresses, with 15-day free returns. Questions? Ask a parts specialist.